About a way to resovle the

About a way to resovle the “Notice Undefined variable” and “Notice: Undefined index”

There are 7 ways at least to resolve the e-notice, like the @ opreator , it would be a fast, and direct way to solve that problem, but it would be imply many security problem. Some other would be like isset(), empty() function, the former one would be used like $value = isset($_POST[‘value’]) ? $_POST[‘value’] : ”; and the later one would be used like this, echo “Hello ” . (!empty($user) ? $user : “”); but at some time it still can’t avoid that boring NOTICE. Here is my recommendation:

//First, import a variability for other places.

$fahrenheit = filter_input(INPUT_POST, “fahrenheit”);

//Second , we can use the filter_input() function to valid the e-notice, like this,

if (filter_input(INPUT_POST, “fahrenheit”)) {

#Coding 

} ;

MORE RECOMMENDATIONS

(ENGLISH VERSION)PHP: “Notice: Undefined variable” and “Notice: Undefined index”

(中文版) PHP Notice: undefined index 完美解决方法